"I have 4-years old Denon-5900 universal player, which I bought also given numerous positive reviews.
Well, comparing to my SlimDevices Transporter, Denon is awful is stereo. Listenable, of course.. but not high-end..
Are these guys still use Burr-Brown DACs?"
On the contrary, I must disagree with this statement. In the past, and on this forum, I castigated Denon about the use of DL 3rd edition--the Denon Link. Have changed my mind, it wasn't the Denon Link that was messing up the sounds, it was probably some sort of corossion caused by our salty air. Replaced the Denon Link and waddya know, the sound was glorious! I have several "high end" CD players in the stable of equipment and the 5910CI is certainly the equal of the best of them in multichannel playback or simple stereo.
Burr Browns are darn good DACs, certainly as good as or better than any competitors.
Also, if the competence of the 5910CI is a measure of what Denon can do, then I am now looking fwd to owning the new A1UDCI (what a mouthful that is). However, I don't give a hang for the three blue lights as long as it is matched with a comparable Denon receiver it will be good. The 5910CI was bought based on Audioholics review and its performance matched that review perfectly.